DUBAI – Reports emerged on Monday indicating that Iranian authorities have initiated a series of arrests targeting prominent figures within the nation’s reformist movement.

This marks an expansion of the government’s ongoing clampdown on dissent, following earlier suppression of nationwide protests—a crackdown that claimed the lives of thousands and resulted in the detention of tens of thousands more.

Among the detained is Nobel Peace Prize winner Narges Mohammadi, who has been handed an additional prison term exceeding seven years. This development highlights a broader strategy to quash opposition to the regime’s harsh measures against unrest as Iran enters new nuclear discussions with the United States. Former President Donald Trump has persistently cautioned that military action against Iran remains an option if no agreement is reached.

According to media outlets, insiders within the reformist camp, which aims to reform Iran’s theocracy from within, reported the arrest of at least four members. This group includes Azar Mansouri, leader of the Reformist Front—a coalition of various reformist groups—and Mohsen Aminzadeh, a former diplomat under the reformist administration of President Mohammad Khatami.

Also taken into custody was Ebrahim Asgharzadeh, known for his role in leading the students who seized the U.S. Embassy in Tehran in 1979, an event that triggered a 444-day hostage ordeal.

The motivation for these arrests appears linked to a reformist statement issued in January, which urged the resignation of Iran’s 86-year-old Supreme Leader Ayatollah Ali Khamenei and proposed the establishment of a transitional governing council to oversee the nation.

Iran’s state-run IRNA news agency quoted a statement from prosecutors in Tehran, the country’s capital, saying four people had been arrested and others summoned to meet authorities. It accused those allegedly involved of “organizing and leading … activities aimed at disrupting the political and social situation in the country amid military threats from the United States and the Zionist regime.”

“Having bludgeoned the streets into silence with exemplary cruelty, the regime has shifted its attention inward, fixing its stare on its loyal opposition,” wrote Ali Vaez, an Iran expert at the International Crisis Group.

“The reformists, sensing the ground move beneath them, had begun to drift — and power, ever paranoid, is now determined to cauterize dissent before it learns to walk.”

However, it remains unclear just how much political support reformists have within Iran. The anger on the streets of Iran during the demonstrations, heard in people shouting “Death to Khamenei!” and in support of the country’s exiled crown prince, appeared to lump reformists in with all other politicians now working in the Islamic Republic.

Iran and the U.S. held new nuclear talks last week in Oman. Foreign Minister Abbas Araghchi, speaking Sunday to diplomats at a summit in Tehran, signaled that Iran would stick to its position that it must be able to enrich uranium — a major point of contention with Trump, who bombed Iranian atomic sites in June during the 12-day Iran-Israel war.

Israeli Prime Minister Benjamin Netanyahu is to travel to Washington this week, with Iran expected to be the major subject of discussion, his office said.

The U.S. has moved the aircraft carrier USS Abraham Lincoln, ships and warplanes to the Middle East to pressure Iran into an agreement and have the firepower necessary to strike the Islamic Republic should Trump choose to do so.

Meanwhile, Iran issued a warning to pilots that it planned “rocket launches” Monday into Tuesday in an area over the country’s Semnan province, home to the Imam Khomeini Spaceport. Such launches have corresponded in the past with Iran marking the anniversary of its 1979 Islamic Revolution.